A new report shows land in the San Joaquin Valley continues to sink at an alarming rate, putting federal and state aqueducts and flood control structures at risk. At the same time, engineers are working to repair Oroville dam spillway.

Jan 10, 6:30 A.M. UPDATE: Round two of a major winter storm arrived early Tuesday in Northern California and Nevada where downpours have already flooded roads and homes and toppled a storied giant sequoia tree.